Service Plug Preventive Wall Cam Pin Retention
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Solution Overview
Problem
Existing service plugs require a removal space and risk damage or foreign matter intrusion due to the design of the grip portion being removable, which is not safe and efficient.
Innovation Solution
A service plug design featuring a first connector housing with cam pins, a second connector housing with a rotatable shaft, and a lever with a cam groove and preventive wall, allowing the second connector housing to be fitted and removed without the need for a separate removal space, preventing damage and intrusion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the grip portion (second connector housing and lever) is designed to be removable from the first connector housing, then the operator's safety is improved during load-side work, but a removal space is required and there is a risk of the grip portion being dropped or damaged
Solution Approach 1:
The harmful part (the risk of dropping or damaging the grip portion) is extracted from the system by making the grip portion permanently integrated with the first connector housing, eliminating the need for removal and thus eliminating the associated risks and space requirements
2Reliability
If the grip portion is designed to be removable, then operator safety is improved, but there is a risk of foreign matter intruding into the first connector housing interior
Solution Approach 1:
The risk of foreign matter intrusion is eliminated by removing the removable grip portion design entirely, making the connector housing a sealed, integrated unit that prevents foreign matter from entering the interior
3Ease of operation
If the cam pin can eject from the cam groove during movement, then the lever can return to its initial position, but the cam pin may be lost or cause damage
Solution Approach 1:
The preventive wall is positioned in advance at the terminating end portion of the cam groove to prevent the cam pin from ejecting, while still allowing the lever to rotate freely between operating positions through the controlled movement of the cam pin along the groove path
Data Source
AI summary
A service plug includes a first connector housing, a second connector housing, and a lever that is rotatable about a rotational shaft on the second housing. The lever is movable between a first operating position and a second operating position. The second connector housing is in a non-fitted state, when the lever is in the first operating position. The second connector housing is in a fitted state, when the lever is in the second operating position. The lever includes a preventive wall at a terminating end portion of the cam groove.